World Radio Day is observed on February 13, 2021. World Radio Day is on 13 February. It was proclaimed on 3 November 2011 by UNESCO's 36th General Conference. It was originally proposed by Spain. The General Conference proclaimed that this day be celebrated by UNESCO on 13 February, the anniversary of the day the United Nations established United Nations Radio in 1946.
In December 2012, The General Assembly of the UN endorsed the proclamation of World Radio Day, thereby becoming a Day to be celebrated by all UN agencies, funds and programmes and their partners. All regional and international broadcasting organizations supported the proclamation. Various radio industry bodies around the world are supporting the initiative by encouraging stations in developed countries to assist those in the developing world.
Radio broadcasting is a one-way wireless transmission over radio waves intended to reach a wide audience. Stations can be linked in radio networks to broadcast a common radio format, either in broadcast syndication or simulcast or both. Audio broadcasting also can be done via cable radio, local wire television networks, satellite radio, and internet radio via streaming media on the Internet. (With material from: Wikipedia)